Please have a look at the Australia Post website https://auspost.com.au/about-us/about-our-site/online-security-scams-fraud/scam-alerts. If you are unsure of the safety of my link please just go to the Australia post website and navigate to 'online security scams and fraud' yourself. Scroll down to reports of 16th March.
The text I received was basically identical.
Please do not click on any links or give any personal information away